[INFO] fetching crate z4-engine 0.2.0...
[INFO] checking z4-engine-0.2.0 against try#ad93f57d532978d6739002a21bc66b45ed22f998 for pr-155418
[INFO] extracting crate z4-engine 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate z4-engine 0.2.0
[INFO] finished tweaking crates.io crate z4-engine 0.2.0
[INFO] tweaked toml for crates.io crate z4-engine 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate z4-engine 0.2.0 on toolchain ad93f57d532978d6739002a21bc66b45ed22f998
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad93f57d532978d6739002a21bc66b45ed22f998" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate z4-engine 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad93f57d532978d6739002a21bc66b45ed22f998" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ad93f57d532978d6739002a21bc66b45ed22f998" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f896bba680d99e050e3579df8c789521cb7554dfa3e65785bc0cdb9c24cb2166
[INFO] running `Command { std: "docker" "start" "-a" "f896bba680d99e050e3579df8c789521cb7554dfa3e65785bc0cdb9c24cb2166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f896bba680d99e050e3579df8c789521cb7554dfa3e65785bc0cdb9c24cb2166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f896bba680d99e050e3579df8c789521cb7554dfa3e65785bc0cdb9c24cb2166", kill_on_drop: false }`
[INFO] [stdout] f896bba680d99e050e3579df8c789521cb7554dfa3e65785bc0cdb9c24cb2166
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ad93f57d532978d6739002a21bc66b45ed22f998" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbeb94eff9d2dbf108a0d6aaeb0c4d122640da37ce10c88408d3aba895f2dee6
[INFO] running `Command { std: "docker" "start" "-a" "bbeb94eff9d2dbf108a0d6aaeb0c4d122640da37ce10c88408d3aba895f2dee6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.162
[INFO] [stderr]    Compiling serde v1.0.215
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[INFO] [stderr]    Compiling tracing-attributes v0.1.27
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[INFO] [stderr]    Compiling futures-macro v0.3.31
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[INFO] [stderr]    Compiling ark-serialize-derive-zypher v0.4.2
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[INFO] [stderr]    Compiling ark-ff-macros-zypher v0.4.2
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[INFO] [stderr]    Compiling pin-project-internal v1.1.7
[INFO] [stderr]    Compiling async-trait v0.1.83
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[INFO] [stderr]     Checking ethers v2.0.14
[INFO] [stderr]     Checking z4-engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `P2pMessage` is never constructed
[INFO] [stdout]   --> src/lib.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct P2pMessage<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/room.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn iter(&self) -> Iter<PeerId, ConnectType> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn iter(&self) -> Iter<'_, PeerId, ConnectType> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `P2pMessage` is never constructed
[INFO] [stdout]   --> src/lib.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct P2pMessage<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/room.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn iter(&self) -> Iter<PeerId, ConnectType> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn iter(&self) -> Iter<'_, PeerId, ConnectType> {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 58s
[INFO] running `Command { std: "docker" "inspect" "bbeb94eff9d2dbf108a0d6aaeb0c4d122640da37ce10c88408d3aba895f2dee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbeb94eff9d2dbf108a0d6aaeb0c4d122640da37ce10c88408d3aba895f2dee6", kill_on_drop: false }`
[INFO] [stdout] bbeb94eff9d2dbf108a0d6aaeb0c4d122640da37ce10c88408d3aba895f2dee6
